[PATCH v2 RESEND 2/3] Documentation: gpio: Add APM X-Gene standby GPIO controller DTS binding
From: Linus Walleij <hidden>
Date: 2015-01-13 09:25:49
Also in:
linux-devicetree, linux-gpio
On Wed, Dec 17, 2014 at 6:10 AM, Y Vo [off-list ref] wrote:
quoted hunk ↗ jump to hunk
Documentation for APM X-Gene standby GPIO controller DTS binding. Signed-off-by: Y Vo <redacted> --- .../devicetree/bindings/gpio/gpio-xgene-sb.txt | 31 ++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/gpio-xgene-sb.txtdiff --git a/Documentation/devicetree/bindings/gpio/gpio-xgene-sb.txt b/Documentation/devicetree/bindings/gpio/gpio-xgene-sb.txt new file mode 100644 index 0000000..3215e4d --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-xgene-sb.txt@@ -0,0 +1,31 @@ +APM X-Gene Standby GPIO controller bindings + +This is a gpio controller in standby domain. + +There are 20 GPIO pins from 0..21. There is no GPIO_DS14 and GPIO_DS15. +Only GPIO_DS8..GPIO_DS13 support interrupt. IRQ mapping 0x28..0x2d. + +Required properties: +- compatible: "apm,xgene-gpio-sb" for X-Gene Standby GPIO controller +- reg: Physical base address and size of the controller's registers +- #gpio-cells: Should be two. + - first cell is the pin number + - second cell is used to specify the gpio polarity: + 0 = active high + 1 = active low +- gpio-controller: Marks the device node as a GPIO controller. +- interrupts: Shall contains the interrupts.
From the example it seems it must contain exactly 6 interrupts?
Then state this.
+Example:
+ sbgpio: sbgpio at 17001000 {
+ compatible = "apm,xgene-gpio-sb";
+ reg = <0x0 0x17001000 0x0 0x400>;
+ #gpio-cells = <2>;
+ gpio-controller;
+ interrupts = <0x0 0x28 0x1>,
+ <0x0 0x29 0x1>,
+ <0x0 0x2a 0x1>,
+ <0x0 0x2b 0x1>,
+ <0x0 0x2c 0x1>,
+ <0x0 0x2d 0x1>;
+ };Yours, Linus Walleij